Preparation and Study of Microstructural and Mechanical Properties of Ni-Tio2 Based Nanocomposite by Electrochemical Deposition Method

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Sariri, Farshid | 2015

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Type of Document: M.Sc. Thesis
Language: English
Document No: 46786 (57)
University: Sharif University of Technology, International Campus, Kish Island
Department: Science and Engineering
Advisor(s): Mohammadi, Mohammad Reza; Ekrami, Ali Akbar
Abstract:
In the present work preparation of Ni-TiO2 films and their microstructural and mechanical properties were studied. For film preparation, DC current mode of electrochemical deposition method was used in Watts Nickel bath with different concentrations of transparent TiO2 sol up to 30 mL/L. It presents a new generation of nano Ni-TiO2 coating as a composite film for corrosion and erosion resistance applications. The best wear volume of 0.0046 mm3 was achieved for 30 mL/L Ni-TiO2 nanocomposite in comparison to 0.0071 mm3 for pure Ni film. Moreover, the coating hardness increased to ~345 HV50 for Ni-TiO2 nanocomposite. Corrosion rate of the coatings improved down to 1.10E-05 mm/year with addition of 7.5 mL/L TiO2 sol in to the Ni bath
Keywords:
Mechanical Properties ; Microstructure ; Corrosion ; Electrochemical Deposition ; Titanium Dioxide-Nickel

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